Tutorial for DirectURL

Enough information for somehow who was able to setup aria2 in daemon
mode on a remote server to use this config option to enable direct
downloads of files via http

README.md

@@ -23,6 +23,12 @@ Configuration
 =============
 Read and edit [configuration.js](configuration.js).
 
+DirectURL
+---------
+If you are familiar with how webservers work, setup a location that points at the configured download directory, check permissions. Specify a full url: ```http://server:port/```
+
+If the above is not obvious, keep reading what this is about in [directurl.md](directurl.md)
+
 Dependencies
 ============
 Well, you need aria2. And a web browser (if that even counts!)

directurl.md

@@ -0,0 +1,64 @@
+DirectURL
+=========
+Consider the following scenarios:
+
+1. aria2 is running on a computer that is not locally accessible via the LAN and the files need to be copied from remote aria2 computer to the local computer
+2. aria2 is running locally somewhere and setting up samba/nfs/etc is "meh"
+
+HTTP to the rescue, already in the browser right?
+
+Simplest way is to use a straightforward Node.js library. In the below complete prescription [send](https://github.com/pillarjs/send) will be used.
+
+Requirements
+------------
+Node.js & NPM
+
+Follow relevant section: [Installing Node.js via package manager](https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager)
+
+Steps
+-----
+1. as part of configuring aria2 to make life easier you will have set the global **dir** option to something like **/home/aria2/downloads**
+2. clearly this folder is owned by the user **aria2** 
+3. open a shell session logged in as **aria2**
+4. run ```cd /home/aria2/downloads```
+5. run ```npm install send```
+6. run ```nano send.js``` or vi if that's your thing
+7. paste the content from below **send.js**
+8. save the file making changes where appropriate _(follow the comments)_
+9. run ```node send.js```
+10. webserver is now running on port 3000 and will serve files from the directory specified
+11. to test open up http://serverip:3000 - should get a response from the webserver, 2 lines of text, any browser errors and something hasn't been done properly, check IP/PORT etc
+12. go back to webui-aria2
+13. go to ```Settings > Connection Settings```
+14. scroll down to Direct Download and put ```http://serverip:3000/``` in base URL field _(make sure have the / on the end)_
+15. now that URL has been specified all the files will be converted into clickable links
+16. checkout the ```more info``` on a download and see for yourself
+17. if you click on files that aren't finished downloading ```you're going to have a bad day```
+
+### send.js
+
+```js
+var http = require('http');
+var send = require('send');
+var url = require('url');
+
+var app = http.createServer(function(req, res){
+  // this one allows the service to fail gracefully and give some feedback
+  function error(err) {
+    res.statusCode = err.status || 500;
+    res.end(err.message);
+  }
+
+  // this just makes sure everything is downloaded and not opened in the browser
+  function headers(res, path, stat) {
+    res.setHeader('Content-Disposition', 'attachment');
+  }
+
+  // specify the same directory that aria2 is using to save files
+  // not sure exactly how windows paths should be done, see if 'c:\downloads' works..
+  send(req, url.parse(req.url).pathname, {root: '/home/aria2/downloads'})
+  .on('error', error)
+  .on('headers', headers)
+  .pipe(res);
+}).listen(3000); // change this to .listen(3000,'127.0.0.1') to only respond to localhost requests then access via SSH tunnel or put stunnel in front of it etc
+```